The radio expansion and brightening of the very young supernova remnant G1.9+0.3

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dc.creatorGreen, D. A.
dc.creatorReynolds, S. P.
dc.creatorBorkowski, K. J.
dc.creatorHwang, U.
dc.creatorHarrus, I.
dc.creatorPetre, R.
dc.date2008-04-15
dc.date.accessioned2026-07-07T09:39:33Z
dc.date.available2026-07-07T09:39:33Z
dc.descriptionRecent radio observations of the small Galactic supernova remnant G1.9+0.3 made at 4.86 GHz with the VLA are presented, and compared with earlier observations at 1.49 GHz which have a comparable resolution (10 x 4 arcsec^2). These show that the radio emission from this remnant has expanded significantly, by about 15 per cent over 23 years, with a current outer diameter of approximately 92 arcsec. This expansion confirms that G1.9+0.3 is the youngest Galactic remnant yet identified, only about 150 years old at most. Recent, lower resolution, 1.43-GHz observations are also discussed, and the integrated flux densities from these and the 4.86-GHz observations are compared with earlier results. This shows that the integrated flux density of G1.9+0.3 has been increasing recently.
dc.description5 pages, 3 figures, accepted by MNRAS Letters
dc.identifierhttps://arxiv.org/abs/0804.2317
dc.identifierhttp://arxiv.org/abs/0804.2317
dc.identifier2008, MNRAS (Letters), 387, L54-L58.
dc.identifierdoi:10.1111/j.1745-3933.2008.00484.x
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/161210
dc.subjectAstrophysics
dc.titleThe radio expansion and brightening of the very young supernova remnant G1.9+0.3
dc.typetext

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